Work and Energy Quiz Review

How much work does Bob do on a 12-kg backpack when carrying it up this flight of stairs?

Tags

NGSS.MS-PS2-4

How fast (in seconds) would Bob have to climb the stairs to match the power of a 100 W light bulb?

Tags

NGSS.MS-PS3-1

If 70 kg Tarzan drops off a 15 m high branch, (initial speed is 0 m/s) how fast is Tarzan moving when he reaches the porch 6m above the jungle floor?

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

1. Little Jimmy was taking his pet rock for a constant velocity walk down at the park. He pulls the leash with 50 N at an angle of 40° from the horizontal. They go a full 150 m before Jimmy gets tired. How much work did Jimmy do on the rock? 

Tags

NGSS.MS-PS3-5

1. Your frictionless rocket sled has a thrust force of 1500 N and pushes you (from rest) across a 100 meter football field. If you and your sled have a combined mass of 300 kg, what is your final velocity? (Use work-energy theorem)

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

A 55 kg sled and kid are traveling 6 m/s along the top of a 3 meter high frictionless hill.  The kid then sleds down into a valley and up the opposite hill. How fast is the kid going at the bottom of the first hill?

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A 55 kg sled and kid are traveling 6 m/s along the top of a 3 meter high frictionless hill.  The kid then sleds down into a valley and up the opposite hill. What maximum height will the kid reach on the opposite hill?

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5